To celebrate the 10th anniversary of the birth of its first 1815 Perpetual Calendar Rattrappante, A. Lange & Söhne introduces a new limited edition version, crafted in 18ct white gold. with rose gold dial.

When it was introduced in 2013, the 1815 RATTRAPANTE PERPETUAL CALENDAR marked a milestone in the recent history of A. Lange & Söhne. The movement, developed entirely in-house, brought together three of the most challenging horological complications without neglecting anything in the design and legibility of the dial, as per Lange tradition. The 1815 RATTRAPANTE PERPETUAL CALENDAR stands out not only for its technical details, but for the clear arrangement of its indications.

The first 1815 Perpetual Split-Second Calendar presented in 2013


After the DATOGRAPH PERPETUAL TOURBILLON (2019) and the LANGE 1 CALENDARIO PERPETUO (2021), it is the third watch by A. Lange & Söhne with an 18-karat pink gold dial. With its traditional railway-style minute track, Arabic numerals and harmonious arrangement of the four sub-dials, the dial reflects the essence of the watch family named after Ferdinand Adolph Lange's birth year. The multiple indications of the perpetual calendar and split-seconds chronograph fit into the classic aesthetics of the first Lange pocket watches. The calendar indications, combined in pairs, are located at 3 and 9 o'clock. The left-hand dial shows the date and day of the week, the right-hand dial the month and leap year.

An accent of color is provided by the indication of the moon phases, shared in a dial with the small seconds at 6 o'clock. At 12 o'clock are the minute counter and the power reserve indication. The shorter golden hand in the inner circle indicates when it is time to re-energize the movement via the winding crown. The longer hand, in burnished steel, indicates the number of stopped minutes.

The watch is powered by the L101.1 hand-wound movement, which is made up of 631 individual elements. The perpetual calendar mechanism alone requires 211 components, while the chronograph mechanism with split-seconds function requires an additional 206. The screw balance wheel, driven by the hairspring developed and produced in the Manufacture, ensures high rate stability.

While the split-seconds chronograph is capable of measuring various intermediate times down to fractions of a second, the perpetual calendar has a "long-term memory". The complex forecasting mechanism ensures the exact indication of the date, day of the week and month, every day for decades, even taking into account leap years. Only on 1 March 2100 does the calendar display need to be corrected by one day in accordance with the rules of the Gregorian calendar which does not include a leap year.

This new 1815 Rattrappante Perpetual Calendar, with case declined in 18-karat white gold (with the same measurements of 41,9 mm by 14,7 mm as the previous versions) and pink gold dial is limited to 100 pieces, with price on request.